Fix OpenID login

Fix OpenID login

The problem was that while openid was stored not-normalized in the database,
the checking code was looking for a normalized form instead.

The commit removing normalization step on saving user preferences
was 8367cad, which might have left old users with normalized openid
and new users with non-normalized one.

This commit makes the checking code look for both normalized and not
normalized form, to be backward compatible.